whonix_shared/usr/share/whonix/postinst.d/70_timezone: fix
build-steps/1100_prepare-build-machine:
- no longer installing dependencies for creating virtual machines for bare metal builds
- no longer installing dependencies for bare metal builds for virtual machine builds
- removed debootstrap as build dependency, because grml-debootstrap Depends on it and therefore automatically fetches it
- removed git as build dependency, git is only required to download the source code but anyone who has the source code, doesn't need git
(if not planing to contribute)
- replaced qemu with qemu-utils, because that includes the required tools
- code refactoring
- comments